Article Dans Une Revue Clay Minerals Année : 2024

Role of particle gradation of clay-sand mixture on interfacial adhesion performance of polymer coating

Résumé

Interface performance between clay-sand mixtures and concrete structures are governed by the mixture composition and its physical properties. Moisture content and particle size distribution play a governing role in deciding the mixture fabric, its porosity, hydraulic conductivity, and its behaviour under various mechanical loading. Application of a polymer interfacial coating can improve the bond performance between soils and concrete mainly by interfacial friction/mechanical interlocking. The present work analyse the interfacial strength development between clay-sand mixtures and a polymer coating with changes in the particle gradation. The multi-scale mechanisms at the interface are investigated giving primary attention to soil porosity. A mixture of 50C:50S exhibited highest interfacial adhesive performance compared to other soil mixes. Also, moisture controlled pores and gradation controlled pores revealed difference in macroscale interfacial strength. Both Mercury Intrusion Porosimetry (MIP) and $^{129}$Xe Nuclear Magnetic Resonance (NMR) were utilized to detect the pore structure of the mixtures. $^{129}$Xe NMR revealed the pore distribution of the mixture ranging from macropores to nanopores and MIP complemented the pore information by determining the critical pore entry diameter in the macropore regime. Mesopores dominated on increasing the fine sand content until a threshold value, thereafter merging of pores occurred and macropores dominated.
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Dates et versions

cea-04510606 , version 1 (19-03-2024)

Identifiants

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Nidhi Murali, Jing Li, Anvi Agarwal, Patrick Berthault, Pijush Ghosh. Role of particle gradation of clay-sand mixture on interfacial adhesion performance of polymer coating. Clay Minerals, 2024, pp.1 - 32. ⟨10.1180/clm.2024.7⟩. ⟨cea-04510606⟩
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